“In some cases a rooftop glamour-gym can influence apartment prices significantly, whereas the humble and only-recently-obsolete ground-floor workout-room is unlikely to move the dial at all, according to Regional Director Scott O’Dell of property valuation and advisory firm Opteon.

“For the luxury, high-end, ‘six-star’ buildings … if you had one building with well-designed gym and lifestyle amenities on a roof top, compared with the same building next door, minus those gym and lifestyle amenities, you would be looking at up to 10 per cent increase [in value] if it were really well designed,” Mr O’Dell said.